Hi Team, I am currently solving issue [SBC-1559](https://issues.apache.org/jira/browse/SCB-1559). The core idea of this issue is using java.time.Clock instead of java.lang.System#currentTimeMillis to get time for mocking purpose. java.time.Clock provides many different ways to generate a clock. I am wondering which one should we use and do we need to specify a zone? Thanks a lot if someone can help.
-------------------------------------- Ang Li